Answer:
C. [tex]52\sqrt{3}\ ft^2[/tex]
Step-by-step explanation:
Use formula for the area of trapezoid
[tex]A=\dfrac{a+b}{2}\cdot h,[/tex]
where a is the smaller base, b is the larger base and h is the height.
From the diagram,
[tex]a=11\ ft\\ \\b=15\ ft\\ \\h=4\sqrt{3}\ ft[/tex]
So, the area of trapezoid is
[tex]A=\dfrac{11+15}{2}\cdot 4\sqrt{3}=13\cdot 4\sqrt{3}=52\sqrt{3}\ ft^2[/tex]
